Get ready to bring the party right to your dessert table with this Funfetti Flag Cake! Imagine a moist, fluffy vanilla cake bursting with colorful sprinkles in every bite, layered with creamy, dreamy frosting, and topped with a festive flag design thatโs perfect for celebrations, summer cookouts, or whenever you want to add a little extra sparkle to your day. Trust me, this cake isnโt just fun to look atโitโs a total crowd-pleaser that brings smiles and happy vibes with every slice.
Whether youโre baking for a holiday, a birthday, or just because, this cake will make your dessert the star of the show. Itโs cheerful, bright, and seriously deliciousโbasically a celebration in cake form!
Why Youโll Love Funfetti Flag Cake
Hereโs the scoop on why this cake is a winner:
Playful & Colorful: The sprinkles inside add a burst of fun and surprise in every bite.
Moist & Tender: Soft vanilla cake layers that practically melt in your mouth.
Eye-Catching Design: The flag decoration makes it perfect for patriotic events or festive occasions.
Easy to Customize: Swap out sprinkles or colors to match any theme or holiday.
Great for All Ages: Kids and adults alike adore this cheerful cake.
(Note: the full ingredients list, including measurements, is provided in the recipe card directly below.)

Disclosure: This post contains affiliate links.If you click and make a purchase, I may earn a small commission at no extra cost to you.
Ingredients in Funfetti Flag Cake
Hereโs what makes this festive cake so delightful:
All-Purpose Flour
The base for tender, fluffy cake layers.
Granulated Sugar
Sweetness to balance and bring out the vanilla.
Baking Powder
Helps the cake rise perfectly.
Salt
Enhances all the flavors.
Unsalted Butter
Adds richness and moisture.
Eggs
Bind everything together and give structure.
Vanilla Extract
For that classic, warm vanilla flavor.
Whole Milk
Keeps the cake soft and moist.
Rainbow Sprinkles
The star of the showโbursting with color and fun inside the cake.
Cream Cheese or Buttercream Frosting
Creamy, smooth, and perfect for layering and decorating.
Blueberries
For the blue section of the flag โ fresh and juicy.
Strawberries or Raspberries
For the red stripes, adding natural sweetness and vibrant color.
White Chocolate Chips or Mini Marshmallows
Optional white elements to add texture and fun.
Instructions
Letโs get baking this fun, festive treat:
Preheat Your Oven
Set it to 350ยฐF (175ยฐC) and prepare your cake pans with butter and flour or parchment paper.
Mix Dry Ingredients
In a bowl, whisk together flour, baking powder, and salt.
Cream Butter and Sugar
In a separate bowl, beat butter and sugar until light and fluffy.
Add Eggs and Vanilla
Beat in eggs one at a time, then stir in vanilla extract.
Alternate Adding Milk and Dry Ingredients
Mix in the flour mixture and milk in batches, starting and ending with flour, until just combined.
Fold in Sprinkles
Gently fold in the rainbow sprinklesโdonโt overmix or the colors will bleed.
Bake the Cake Layers
Divide batter evenly into pans and bake for 25-30 minutes or until a toothpick comes out clean.
Cool Completely
Allow the cakes to cool fully before frosting.
Frost and Assemble
Spread a layer of frosting between the cakes and over the top and sides.
Decorate the Flag
Arrange blueberries in the top-left corner for the blue field, and create red and white stripes using sliced strawberries/raspberries and white chocolate chips or marshmallows.
Chill and Serve
Pop the cake in the fridge for 30 minutes to set the frosting, then slice and enjoy!
Nutrition Facts
Servings: [Number of servings]
Calories per serving: [Calorie count per serving]
Preparation Time
Prep Time: [Time to mix and prep ingredients]
Cook Time: 25-30 minutes baking
Total Time: [Total time including cooling and decorating]
How to Serve Funfetti Flag Cake
Perfect alongside:
Cold Milk or Lemonade: Refreshing drinks to balance the sweetness.
Ice Cream: A scoop of vanilla or berry sorbet makes a great pairing.
Fresh Fruit: Keep it light with a side of seasonal berries or melon.
Coffee or Tea: Great for afternoon celebrations or dessert time.
Additional Tips
Keep Sprinkles Bright: Use โjimmiesโ rather than nonpareils to prevent color bleeding.
Make Ahead: Bake the layers a day ahead and frost just before serving.
Frosting Tips: For cleaner edges, chill the cake between frosting layers.
Customize Colors: Swap fruit or sprinkles to match any holiday or theme.
Storage: Store covered in the fridge for up to 3 days.
FAQ Section
Q1: Can I use boxed cake mix instead of from scratch?
A1: Yes! Just add sprinkles to the batter and decorate as directed.
Q2: What kind of sprinkles work best?
A2: Jimmies hold their shape better during baking than nonpareils.
Q3: Can I make this dairy-free?
A3: Substitute dairy-free butter and milk, and use a dairy-free frosting.
Q4: How do I keep the fruit from making the frosting soggy?
A4: Add the fruit just before serving, or pat dry with paper towels.
Q5: Can I freeze this cake?
A5: Yes, wrap tightly and freeze for up to 1 month. Thaw overnight in the fridge.
Q6: Can I use frozen fruit?
A6: Fresh fruit is best for decoration, but frozen can be used if thawed and drained.
Q7: How thick should the frosting layers be?
A7: Aim for about ยฝ inch between layers and a thin crumb coat on the outside.
Q8: What if my cake layers are uneven?
A8: Use a serrated knife or cake leveler to trim and even them out.
Q9: Can I add food coloring to the frosting?
A9: Absolutely! Pastel or bright colors work great for extra flair.
Q10: How do I transport this cake safely?
A10: Use a sturdy cake box and keep it chilled until serving.
Conclusion
This Funfetti Flag Cake is more than just a dessertโitโs a celebration wrapped in layers of fluffy cake, colorful sprinkles, and festive fruit thatโll light up any occasion. So whether youโre cheering on your favorite team, marking a holiday, or just craving something sweet and cheerful, this cake is your delicious go-to. Grab your mixing bowls and get ready to bake up some fun!
Print
Funfetti Flag Cake
- Total Time: 1 hour 55 minutes (including chilling)
- Yield: 12 servings 1x
- Diet: Vegetarian
Description
A festive and colorful vanilla funfetti cake decorated like a flag with whipped cream and fresh berries, perfect for celebrations.
Ingredients
- 1 box vanilla cake mix (or homemade vanilla cake batter)
- 1 cup rainbow sprinkles
- 1 cup heavy whipping cream
- 2 tablespoons powdered sugar
- 1 teaspoon vanilla extract
- 1 cup fresh blueberries
- 1 cup fresh strawberries, sliced
- 1 cup fresh raspberries
Instructions
- Prepare the cake batter according to package instructions or recipe.
- Gently fold in the rainbow sprinkles into the batter.
- Bake in a greased 9ร13-inch pan at 350ยฐF (175ยฐC) for 30-35 minutes or until a toothpick comes out clean.
- Let the cake cool completely.
- In a chilled bowl, whip heavy cream with powdered sugar and vanilla extract until stiff peaks form.
- Spread the whipped cream evenly over the cooled cake.
- Arrange blueberries in the top left corner to represent the stars.
- Create red and white stripes by alternating rows of sliced strawberries and raspberries across the rest of the cake.
- Chill the cake for at least 1 hour before serving.
Notes
- Use gel food coloring in whipped cream for a more vibrant flag.
- Swap fresh berries with canned pie filling for convenience.
- Perfect for Fourth of July, Memorial Day, or any patriotic event.
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baked
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 350
- Sugar: 28g
- Sodium: 250mg
- Fat: 18g
- Saturated Fat: 10g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 40g
- Fiber: 2g
- Protein: 4g
- Cholesterol: 60mg